May in Denver is a vibrant time of year when the city truly comes to life. As spring transitions into early summer, the Mile High City enjoys mild temperatures, blooming landscapes, and longer days—perfect conditions for outdoor activities and events. Locals and visitors alike flock to festivals, farmers markets, and live music performances across the city. From the popular Cinco de Mayo celebration in Civic Center Park to the start of Red Rocks concert season, May offers a dynamic mix of cultural, culinary, and artistic experiences that showcase Denver’s unique energy and scenic charm.
Explore Other Months
Cinco de Mayo “Celebrate Culture” Festival
May 5, 2026
Join us for an unforgettable celebration at the largest and longest-standing regional Cinco de Mayo festival in Colorado! Immerse yourself in the vibrant spirit of Mexican culture with a weekend full of exciting events, contests, and non-stop entertainment across three dynamic stages. Indulge your taste buds at our diverse food vendors, and explore unique merchandise from local artisans. Bring the whole family to enjoy kid-friendly activities and create lasting memories together. Don’t miss out on this iconic event that has been a cornerstone of Colorado’s Cinco de Mayo celebrations for years.
The Great Estes Park Duck Race
The Great Estes Park Duck Race is held annually on the first Saturday in May. The Annual Duck Race continues a tradition started in 1989, which has returned more than $3 million (and counting) to local charities and groups!
Chocolate Festival
May (Mothers day weekend), 2026
Each year, Dana Cain Events hosts a variety of delicious chocolate festivals and chocolate & cheese fests around the state of Colorado! Dana has won 16 “Best of Denver” awards for her events, including “Best Food Fair,” “Best New Festival” and “Best Annual Festival (3 years in a row!).”
Colfax Marathon
May 16-17, 2026
The Denver Colfax Marathon is Denver’s largest running event, taking place over two days with multiple races including a full marathon, half marathon, urban 10 miler, 5K, and a marathon relay. It’s known for its urban course, which includes unique features like running through Empower Field at Mile High, Denver Zoo, and past iconic Denver locations. The marathon is also a Boston Marathon qualifier.
Outside Festival
May TBA, 2026
The Outside Festival, presented by Capital One x REI Co-op, is a two-day event in Denver’s Civic Center Park celebrating the outdoors with live music, adventure films, thought-provoking speakers, and immersive experiences. It aims to inspire, educate, and connect people with the outdoors. The festival includes a variety of activities such as live music performances, film screenings, gear demonstrations, and wellness-focused activities like yoga and cold plunges.
South Gaylord Memorial Day Weekend Festival
May (Memorial Day weekend), 2026
The South Gaylord Street Memorial Weekend Festival is a three-day event. It will be held on the 1000 block of Old South Gaylord Street in Denver, Colorado. The festival will feature live music, food trucks, local drinks, and a vibrant community atmosphere, kicking off the summer season.
See something we missed? Please email and let us know to add it to our calendar. The schedule is updated monthly.
Looking for something more adventurous? Schedule an eBike Tour of Denver and see Denver’s top landmarks all in one trip!